<template>
  <div class="add-role">
    <header class="add-header">
      <div class="left">
        <span class="arrow" @click="$router.back()"
          ><i class="el-icon-arrow-left" />返回</span
        >
        <span>|</span>
        <span>{{ id ? '编辑角色' : '添加角色' }}</span>
      </div>
      <div class="right">黑马程序员</div>
    </header>
    <main class="add-main">
      <div class="step-container">
        <el-steps direction="vertical" :active="activeStep">
          <el-step title="角色信息" />
          <el-step title="权限信息" />
          <el-step title="检查并完成" />
        </el-steps>
      </div>
      <div class="form-container" v-show="activeStep === 1">
        <div class="title">角色信息</div>
        <div class="form">
          <el-form
            ref="roleForm"
            class="form-box"
            :model="roleForm"
            :rules="roleRules"
          >
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="roleForm.roleName" />
            </el-form-item>
            <el-form-item label="角色描述" prop="remark">
              <el-input v-model="roleForm.remark" />
            </el-form-item>
          </el-form>
        </div>
      </div>
      <div class="form-container" v-show="activeStep === 2">
        <div class="title">权限配置</div>
        <div class="tree-wrapper">
          <div class="tree-item" v-for="item in treeList" :key="item.id">
            <div class="tree-title">{{ item.title }}</div>
            <el-tree
              ref="tree"
              :data="item.children"
              show-checkbox
              check-strictly
              default-expand-all
              node-key="id"
              :props="defaultProps"
            />
          </div>
        </div>
      </div>
      <div class="form-container" v-show="activeStep === 3">
        <div class="title">检查并完成</div>
        <div class="form">
          <div class="info">
            <div class="form-item">角色名称：{{ roleForm.roleName }}</div>
            <div class="form-item">角色描述：{{ roleForm.remark }}</div>
            <div class="form-item">角色权限：</div>
            <div class="tree-wrapper">
              <div v-for="item in treeList" :key="item.id" class="tree-item">
                <div class="tree-title">{{ item.title }}</div>
                <el-tree
                  ref="diabledTree"
                  :data="item.children"
                  show-checkbox
                  check-strictly
                  default-expand-all
                  node-key="id"
                  :props="{ label: 'title', disabled: () => true }"
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </main>
    <footer class="add-footer">
      <div class="btn-container">
        <el-button @click="prev" v-show="activeStep !== 1">上一步</el-button>
        <el-button type="primary" @click="next" v-show="activeStep !== 3"
          >下一步</el-button
        >
        <el-button type="primary" v-show="activeStep === 3" @click="confirmAdd">
          确认添加
        </el-button>
      </div>
    </footer>
  </div>
</template>

<script>
import {
  getTreeListAPI,
  createRoleUserAPI,
  getRoleDetailAPI,
  updateRoleAPI
} from '@/api/system'
export default {
  name: 'AddRole',
  data () {
    return {
      activeStep: 1,
      roleForm: {
        roleName: '',
        remark: '',
        perms: []
      },
      roleRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        remark: [{ required: true, message: '请输入描述名称', trigger: 'blur' }]
      },
      treeList: [],
      defaultProps: {
        label: 'title'
      }
    }
  },
  computed: {
    id () {
      return this.$route.query.id
    }
  },
  created () {
    this.getTreeList()
    if (this.id) {
      this.getRoleDetail()
    }
  },
  methods: {
    // 数据回显
    async getRoleDetail () {
      const res = await getRoleDetailAPI(this.id)
      this.roleForm = res.data
      // 回显第二部
      this.$refs.tree.forEach((tree, index) => {
        tree.setCheckedKeys(this.roleForm.perms[index])
      })
      console.log(res)
    },
    // 添加接口
    async confirmAdd () {
      if (this.id) {
        delete this.roleForm.userTotal
        await updateRoleAPI(this.roleForm)
        this.$message.success('修改成功')
      } else {
        await createRoleUserAPI(this.roleForm)
        this.$message.success('添加成功')
      }
      // console.log(res)
      this.$router.back()
    },
    // 获取所有的权限
    async getTreeList () {
      const res = await getTreeListAPI()
      this.treeList = res.data
    },
    prev () {
      if (this.activeStep > 1) {
        this.activeStep--
      }
    },
    next () {
      if (this.activeStep < 3) {
        if (this.activeStep === 1) {
          this.$refs.roleForm.validate(flag => {
            if (!flag) {
              return
            }
            this.activeStep++
          })
        } else if (this.activeStep === 2) {
          // 进入下一步之前需要判断
          // 进入下一步之前清除perms的原有的数据
          this.roleForm.perms = []
          this.$refs.tree.forEach(tree => {
            // console.log(tree.getCheckedKeys())
            this.roleForm.perms.push(tree.getCheckedKeys())
          })
          if (this.roleForm.perms.flat().length <= 0) {
            // console.log('hahah')
            this.$message.warning('还没有勾选权限信息')
            return
          }
          this.$refs.diabledTree.forEach((tree, index) => {
            tree.setCheckedKeys(this.roleForm.perms[index])
          })
          this.activeStep++
        }
      }
    }
  }
}
</script>
<style scoped lang="scss">
.add-role {
  background-color: #f4f6f8;
  height: 100vh;

  .add-header {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    height: 64px;
    line-height: 64px;
    font-size: 16px;
    font-weight: bold;
    background-color: #fff;

    .left {
      span {
        margin-right: 4px;
      }

      .arrow {
        cursor: pointer;
      }
    }

    .right {
      text-align: right;
    }
  }

  .add-main {
    position: fixed;
    top: 64px;
    bottom: 88px;
    width: 100%;
    overflow-y: auto;
    background: #f4f6f8;
    padding: 20px 230px;
    display: flex;
    .step-container {
      height: 400px;
      width: 200px;
    }
    .form-container {
      flex: 1;
      background-color: #fff;
      overflow-y: auto;
      .title {
        height: 60px;
        line-height: 60px;
        padding-left: 20px;
      }
      .form {
        margin-bottom: 20px;
        padding: 20px 65px 24px;
        .el-form {
          display: flex;
          flex-wrap: wrap;
        }
        .info {
          font-size: 14px;
          color: #666;
          .form-item {
            margin-bottom: 20px;
          }
        }
      }
      .form-box {
        width: 600px;
        display: flex;
        flex-direction: column;
      }
    }
  }

  .add-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    padding: 24px 50px;
    color: #000000d9;
    font-size: 14px;
    background: #fff;
    text-align: center;
    z-index: 10001;
  }
  .tree-wrapper {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    .tree-item {
      flex: 1;
      padding: 0px 4px;
      text-align: center;
      .tree-title {
        background: #f5f7fa;
        text-align: center;
        padding: 10px 0;
        margin-bottom: 12px;
      }
    }
  }
}
</style>
